utils/css/css.dart

// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

library css;

import 'dart:math' as Math;
import '../lib/file_system.dart';
import '../lib/file_system_memory.dart';

part 'cssoptions.dart';
part 'source.dart';
part 'tokenkind.dart';
part 'token.dart';
part 'tokenizer_base.dart';
part 'tokenizer.dart';
part 'treebase.dart';
part 'tree.dart';
part 'cssselectorexception.dart';
part 'cssworld.dart';
part 'parser.dart';
part 'validate.dart';
part 'generate.dart';
part 'world.dart';


void initCssWorld([bool commandLine = true]) {
  FileSystem fs = new MemoryFileSystem();
  parseOptions([], fs);
  initializeWorld(fs);

  // TODO(terry): Should be set by arguments.  When run as a tool these aren't
  // set when run internaly set these so we can compile CSS and catch any
  // problems programmatically.
  options.throwOnErrors = true;
  options.throwOnFatal = true;
  options.useColors = commandLine ? true : false;
  options.warningsAsErrors = false;
  options.showWarnings = true;
}

// TODO(terry): Add obfuscation mapping file.
void cssParseAndValidate(String cssExpression, CssWorld cssworld) {
  Parser parser = new Parser(new SourceFile(SourceFile.IN_MEMORY_FILE,
      cssExpression));
  var tree = parser.parseTemplate();
  if (tree != null) {
    Validate.template(tree.selectors, cssworld);
  }
}

// Returns pretty printed tree of the expression.
String cssParseAndValidateDebug(String cssExpression, CssWorld cssworld) {
  Parser parser = new Parser(new SourceFile(SourceFile.IN_MEMORY_FILE,
      cssExpression));
  String output = "";
  String prettyTree = "";
  try {
    var tree = parser.parseTemplate();
    if (tree != null) {
      prettyTree = tree.toDebugString();
      Validate.template(tree.selectors, cssworld);
      output = prettyTree;
    }
  } catch (e) {
    String error = e.toString();
    output = "$error\n$prettyTree";
    throw e;
  }

  return output;
}